| uart.4 (267938) | uart.4 (286591) |
|---|---|
| 1.\" 2.\" Copyright (c) 2003 Marcel Moolenaar 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" --- 9 unchanged lines hidden (view full) --- 18.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" | 1.\" 2.\" Copyright (c) 2003 Marcel Moolenaar 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" --- 9 unchanged lines hidden (view full) --- 18.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" |
| 26.\" $FreeBSD: head/share/man/man4/uart.4 267938 2014-06-26 21:46:14Z bapt $ | 26.\" $FreeBSD: head/share/man/man4/uart.4 286591 2015-08-10 20:08:09Z ian $ |
| 27.\" | 27.\" |
| 28.Dd March 12, 2008 | 28.Dd August 10, 2015 |
| 29.Dt UART 4 30.Os 31.Sh NAME 32.Nm uart 33.Nd driver for Universal Asynchronous Receiver/Transmitter (UART) devices 34.Sh SYNOPSIS 35.Cd "device uart" 36.Pp --- 109 unchanged lines hidden (view full) --- 146NS8250: standard hardware based on the 8250, 16450, 16550, 16650, 16750 or 147the 16950 UARTs. 148.It 149SCC: serial communications controllers supported by the 150.Xr scc 4 151device driver. 152.El 153.\" | 29.Dt UART 4 30.Os 31.Sh NAME 32.Nm uart 33.Nd driver for Universal Asynchronous Receiver/Transmitter (UART) devices 34.Sh SYNOPSIS 35.Cd "device uart" 36.Pp --- 109 unchanged lines hidden (view full) --- 146NS8250: standard hardware based on the 8250, 16450, 16550, 16650, 16750 or 147the 16950 UARTs. 148.It 149SCC: serial communications controllers supported by the 150.Xr scc 4 151device driver. 152.El 153.\" |
| 154.Sh Pulse Per Second (PPS) Timing Interface 155The 156.Nm 157driver can capture PPS timing information as defined in RFC 2783. 158The API, accessed via 159.Xr ioctl 8 , 160is available on the tty device. 161To use the PPS capture feature with 162.Xr ntpd 8 , 163symlink the tty device to 164.Va /dev/pps0. 165.Pp 166The 167.Va hw.uart.pps_mode 168tunable configures the PPS capture mode for all uart devices; 169it can be set in 170.Xr loader.conf 5 . 171The 172.Va dev.uart.0.pps_mode 173sysctl configures the PPS capture mode for a specific uart device; 174it can be set in 175.Xr loader.conf 5 176or 177.Xr sysctl.conf 5 . 178The following capture modes are available: 179.Bl -tag -compact -offset "mmmm" -width "mmmm" 180.It 0 181Capture disabled. 182.It 1 183Capture pulses on the CTS line. 184.It 2 185Capture pulses on the DCD line (default). 186.El |
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| 154.Sh FILES 155.Bl -tag -width ".Pa /dev/ttyu?.init" -compact 156.It Pa /dev/ttyu? 157for callin ports 158.It Pa /dev/ttyu?.init 159.It Pa /dev/ttyu?.lock 160corresponding callin initial-state and lock-state devices 161.Pp --- 20 unchanged lines hidden --- | 187.Sh FILES 188.Bl -tag -width ".Pa /dev/ttyu?.init" -compact 189.It Pa /dev/ttyu? 190for callin ports 191.It Pa /dev/ttyu?.init 192.It Pa /dev/ttyu?.lock 193corresponding callin initial-state and lock-state devices 194.Pp --- 20 unchanged lines hidden --- |